Rotating your tires on a regular basis helps prevent premature tire wear and could save you hundreds of dollars. You may ask why this is and the answer to that question is relatively simple. Your front tires are constantly turning and this will generally wear them out faster than the back tires. Also when this happens it puts more pressure on the outside edge of the tire, therefore the outside edge will wear out much faster. By rotating your tires it evens out the wear on all of your tires. Tires can be rotated a variety of ways; side to side, front to back, or a combination of both.
Tire manufactures vary as to how often tires should be rotated. My suggestion is every 6,000 miles as a rule of thumb. This is a great time to check your tire pressure and also a great time to check the tires for other problems such as; uneven wear, weather cracks in the side walls, worn valve stems and cupping.
Tire cupping (scalloping) is a very common problem I would like to briefly mention. Tire cupping is when your tread becomes uneven. Many times this will cause your steering wheel to shake or you may hear noise coming from your tires. Rotating your tires on a regular basis helps prevent cupping from happening. If you notice any signs of this happening the best thing to do is take it to a professional to have it looked at.
In my opinion the tires on your vehicle are one of the most important components of your vehicle and need to be well maintained.